微生物が促進する砂粒の膠結 : 薩摩硫黄島にみられるバイオテラス

概要

論文の詳細を見る
Satsuma Iwo-Jima Island (SIJ) is a small volcanic island located on the north-westernmost margin ofthe Kikai caldera. The acidic mineral-rich hot springs cause various tonal changes of seawater in andaround of this island. The red sea water depended on high density of Fe^<2+> (191ppm) can be seen atNagahama Port on a large scale. At this port, microbes which metabolize Fe^<2+>, make microbial mats andtypical terrace-like sediment (bio-terrace). Extra cellular substance secreted by microbes adhere sandgrains, and after that this bio-terrace is formed by cementation. The build-up of bio-terrace is very fastand piled up over 1 meter in just 3 months. SIJ is a good example where we can research the developingprocess of ancient stromatolite.Microbes, sand grains, adhension, cementation, bio-terrace, hot springs, Fe^2+.
日本粘土学会の論文
2001-05-21